This circuit is from the Motorola Linear Databook of 1990 and can be implemented with other operational amplifiers. The power supply must be symmetrical.
May 6, 2015 - Mouser Electronics, Inc., the global authorized distributor with the newest...
This TTL module can be used in counter and many of them can be cascaded to counts up to 99, 999,...
Placed inside the refrigerator, this circuit triggers an oscillator when the part is opened...